The best way to apply 0.5 oz glass to a fuselage or sheeted wing is with thinned K&B Epoxy clear w/ satin finish hardener. The cloth is brushed down on finish sanded raw wood. Just one thin coat is applied, just enough to lay the cloth down, not enough resin that a gloss surface appears. Let cure overnite, and sand. Apply a second coat of the resin ….. not glossy, just thin coat. The best thing about this method is the resin cures rock hard overnite and sands very easily, and the satin finish hardener fills somewhat. For me, applying resin and scraping it off, sometimes left a gummy surface that was difficult to sand.
I know K&B is gone, unless you have a stash of it. I would hope that KlassKote would work the same.
Carbon veil does add strength ….. a number of people who have applied veil to wing sheeted surfaces from wingtip to fuselage intersection (without carrying through the fuselage) have had the wing shear off right at the intersection during a hard pull. In other words, the outer wing now was much stiffer and the load at the carbon / non-carbon line was magnified greatly.